A porous cast iron sleeve bearing-making technology of great economic value is widely used in the machine-building industry sector of the DPRK. The sleeve bearing is made of expensive nonferrous metal and its melting, moulding and machining processes are very complicated, with large power consumption. The new technology makes it possible to make the sleeve […]
The builders of the Wonsan Army-People Power Station are speeding up the assembly of iron pipes for power station No.2. With an aim to finish the project in a short time, the builders have been overfulfilling their assignments every day in the New Year. The command of the project makes detailed arrangements to lay iron […]
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